Script to remove all videos from Youtube Watch Later playlist

Remove videos from Youtube Watch Later playlist.md

UPDATED 22.11.2022

It's been two years since the last update, so here's the updated working script as per the comments below.

Thanks to BryanHaley for this.

setInterval(function () {
    video = document.getElementsByTagName('ytd-playlist-video-renderer')[0];

    video.querySelector('#primary button[aria-label="Action menu"]').click();

    var things = document.evaluate(
        '//span[contains(text(),"Remove from")]',
        document,
        null,
        XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
        null
    );

    for (var i = 0; i < things.snapshotLength; i++) 
    {
        things.snapshotItem(i).click();
    }
}, 500);

Non-english users will need to change "Action menu" and "Remove from" to what YouTube uses for their localization.

Thanks @vinivosh
Here's Vietnamese version, including removing the hidden videos and clearing the interval after the playlist is empty

1. Go to Youtube Watch Later playlist
2. Ctrl + Shift + I to open chrome devtools -> Choose the Console tab
3. Type 'allow pasting' in the console
4. Paste this into the console

var deleteInterval = setInterval(function () {
    video = document.getElementsByTagName('ytd-playlist-video-renderer')[0];

    if(!video) {
         clearInterval(deleteInterval);
         return;
    }

    video.querySelector('#primary button[aria-label="Menu tác vụ"]').click();

    var things = document.evaluate(
        '//span[contains(text(),"Xóa khỏi")]',
        document,
        null,
        XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
        null
    );

    for (var i = 0; i < things.snapshotLength; i++) 
    {
        things.snapshotItem(i).click();
    }
}, 1000);

5. Paste this into the console to remove the hidden videos

// Show hidden videos
var btnListWL = document.querySelector('.metadata-buttons-wrapper.style-scope.ytd-playlist-header-renderer');
btnListWL.lastElementChild.lastElementChild.lastElementChild.click();
setTimeout(() => {
     var showHiddenVideoLink = document.querySelector('a[href="/playlist?list=WL"]').click();
}, 500);

// Remove the hidden videos
setTimeout(() => {
var deleteHiddenVideosInterval = setInterval(function () {
    video = document.getElementsByTagName('ytd-playlist-video-renderer')[0];

    if(!video) {
         clearInterval(deleteHiddenVideosInterval);
         return;
    }

    video.querySelector('button').click();

    var things = document.evaluate(
        '//span[contains(text(),"Xóa khỏi")]',
        document,
        null,
        XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
        null
    );

    for (var i = 0; i < things.snapshotLength; i++) 
    {
        things.snapshotItem(i).click();
    }
}, 1000);
}, 1000);